body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
}

h1, h2, h3 {
    color: #333;
}

.about {
    padding: 20px;
    text-align: center;
}

.book-list {
    list-style-type: none;
    padding: 0;
}

.book-item {
    background: #fff;
    margin: 10px 0;
    padding: 15px;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.add-book-form {
    margin: 20px 0;
    padding: 15px;
    background: #fff;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}